Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86ad2527ed2b39bb1309c859b14b0c3fddaaef9581e7940eb48bf629294faed1' 
  AND token = 'UrJWwpeqU/lEv1AoeJTW8dt5xEmofdKd7J7/CRI47rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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