Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd891544e9338c7d6291230a2e2c7fdeafc467d31ffc4bbacad82845153205c74' 
  AND token = 'HFTD8vj9oh/VsxYxtvX5j/1TXfQQyrM1eYxmEWkEGQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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