Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd2b0a3eb42adeb243ecc06ee54f76a576c18f4c8527c06db2dbdb6ec79ca30c1' 
  AND token = '/Z6DC/QvuuXvlxLw6wIc2ddGqHG5/ikrSfkIgajnaAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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