Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03a5a9bf5da3774d0f25960a2ba1761b85f541b082ae348fa521c26301d11684' 
  AND token = 'XDHplPimOOB5FtubHkEUAnrKwdxP0tagzxNhCM1dD+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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