Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fabd560a9e76367ee181d7a368c0736892d7708df6249830d2f20557204cae1c' 
  AND token = 'MtncZJrckBBcNUfElYaB1/Xx0J0ml5v5jRxnFHPvp+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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