Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04fe399ed9b5545d15aac9184d6ffafa997362afff858fca187452ef3632bea4' 
  AND token = '7+JGSoRMlOGOc1jx/PIOFPfzJcy3qkE1tjLQ4GBBBFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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