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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b9b3a493fa086643e6da3f8d3aef8e809355c5173140b0c2128ff8eb5cc729' 
  AND token = 'CaudUUj3IBej/oBIGMuxBGgjXAj6OceNTdv2QautV/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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