Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dec6e09a562ad168eff75c478624a2b3c0e82607196f30c633016728f0677fdb' 
  AND token = '3/S36inoRX38fE+IG0GFbEmY4gJmX8GTqaIH6k4vaKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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