Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5849d05707c90c8c969244c24881e3e4cbff399e2da1a04ca32bf59977383c30' 
  AND token = 'D7MONyn9+6JeZkozwI+gxEsJCZAchjmUcODZPxmb7ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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