Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62f6f2680f2fa89878e470eef7ea3803b648d66c4c863ae30e8210bcc271ae94' 
  AND token = 'M7lFZ2ItDWnsCDVAMy7b2zXrZ6nx04JuB8uzonNuP2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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