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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90a06efe837c49049be982b103875dd2fc3c58f1ada4c5bae167726a60292f7a' 
  AND token = 'LWPY9/TcCXSfrdrQhH3/JC8JiKxSb6sB4rr4t31xNlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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