Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb21333189c549107f4fa5069833b78b6379cf977e2a15870ba67bffbf642a09' 
  AND token = 'kEMCxZIK0x88r57axTfsvsaYWy4ClwHxEmRS1smt6Q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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