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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6f4780036bedb42a0d719c58a9d26c684d39e9cf4382de9e25fd2e562241c766' 
  AND token = 'NDLx3AkQwHVKkXDoDYPRXTmeTjkNP/drCwXD5TGvI1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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