Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6ece33748ef7538250b18324f621d03b36c457035b5010c44a663c6556613de' 
  AND token = 'ectDNT/WHGzkC/m1kyq/H93VhFA4Fmfu5Bfn8uwVCTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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