Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fd8ae3f6f76a500450084208cfb2d4de91ded6ba0e408c301983cca04e51494' 
  AND token = 'xs32wmzSNKNjIjrfvxAY66IguOsqQlOEle9BK3bBUuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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