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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff018d5f7b62d02ad63cc55ce3d6d6322800e3c23253ef165e7e3025c4814f63' 
  AND token = 'Yhdi3ISjwSs2Xfj9rTYgH6+AkuFaopbxWGz1FMN9k18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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