Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a3e4d0a3657afc8b11910cca10761bcdb9030eda5ef4309903bd0bb5cf8573d' 
  AND token = 'tzLnhSHKuJ7YypRhauKaHvoFyQtFQvBp2Xcp3I1ScxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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