Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70ddb2dbefa16b63375c181247a4881f89b884bf2b0f0fc09d6b0a61ba2c2c01' 
  AND token = 'wxXGdzmr2tpcmwS0XFjYSV1JlM+6kTayCgVepxuMmM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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