Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96f08cde68ab5555bbc9e7e5e2c3cc933a1ae061f44f9f02589fa9b79c28f48b' 
  AND token = 'u+0fJYwmQVc5cHNA8dOMVaN50YIbvYKLV5NgISjigcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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