Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5132e0ca4ce095feaf5fc4d5e3c367c113f53cceeb1d221cd30f3e3d2094270c' 
  AND token = '8UV8Ax8jG7FxPZ7Dz1OBt59t0auxKg4bl/GTzE3KQ24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}