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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1fa0b0010a28b3bd5aad2996644eac2970e922d84263f991bdb22c2f716b0b' 
  AND token = 'hF1/dUKN6xtwfK22jeMoCh+USPIAa6KKo/Ys6yx11vg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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