Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fe3a3e071604d125e9f082732ff73bbb8b60ac4750a0e5d1955ff436bdd0fc5' 
  AND token = 'u74jQm62J5y3oaR5S1FDIcAqdTqNCTjw2lPAtYlNGSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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