Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '488dfd752f0ba3a077a34c00c085b05b0da5eb93eb70ceab7f0513b26ba7c982' 
  AND token = 'tQuqSuLtAsMQcorWSKBc36LO5zG3wXT0YcBQE8UafUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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