Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2c9138aa27a12a8fc8f3a2ba528eb91b2a917df2f4c56840c111f040d0d3807c' 
  AND token = '5uK0vOpLy5jPy99kfCdNrv8qsY2r0GMhjdFe2QEGCU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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