Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '137da913b42124fbaf579e05fe03463817c04fe033af1769250efdbc1544e8a1' 
  AND token = 'kZF2ujhRawd1zqtFZdi2oSfsr8ltqRkWTZlNGhNldwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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