Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a01c203a5b0f516a55722dfab4d926391ed112e98c53051da3bd16fd4aa2341a' 
  AND token = 'w5YfFS+wQ25aCvC01k1QECoqZj/M1ZiUw4q/lH4c4f0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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