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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bb9328aa86d17f1ca6ec05d441b38072ce3ee00a0ad9bffce9c9bf25a17ef9f' 
  AND token = '13p5pvub3AYxGOr2jOeL5zsHrtRtK649oQ+ZqKP2GXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}