Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d49bd84f33cac957d304f3b17ac0c1f23158cf4cfbb5fb872f1a20c73aba1d4' 
  AND token = 'wHGPaVMvmrmqsqViSeGc0buZEqCRZk4UJnXD9Bn8E7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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