Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f0ef2d5ecf598fdd41582fbfa3845bf9d556aff5e2154dd17290d69108305d0' 
  AND token = 'zloZOP39zyUN75B8TAWRjWsULHOGOE/leFYrVJTXU2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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