Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25af315dde0bfe21c700aa11fe944ba9e29f0d2cff9cb574c3f700113728dbe0' 
  AND token = 't50+HDhRNdjPUJmWQy/OUK14gUIvv0Gf2vi5zDVgltc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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