Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ce6708dfb1143eeb1ab248b99ceaab842f4bfe2a48acf731862d084dec7cc91c' 
  AND token = '1GTvPaSBye/D0X5Db3dJF2L0cWloa+uet1fy3KeQcwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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