Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '169e35bbd27e893700ea5c2fcbf33f9f70e10d41125ac0b797cd1dfa13c9e626' 
  AND token = 'nC5F9NKL4JJtZE8pQ7D7JYjuNuGqeSFNdYBTZ5Z67YQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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