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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ea532eeba691bf08521bb724931e76e61d1c32520ef766ec447c4bcee9933e1' 
  AND token = 'kyTkC88jH83mIl4pOV27j8HFygG1p7aD2ZvjhGu7HHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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