Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3661f72fcd7f7ac87b552c72ef4e57655229387dee779ef094b612a7dd3bcf14' 
  AND token = 'Gqa9JlIby88HuSjFPEcgJ98S/9TUSgMcpm/0oi55q90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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