Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ce160853c071ec5e45b9a1ab0bcef6841261680bd5753e694a5016c56f07aed' 
  AND token = 'dGN6wP88yAfZFhdecp+qzZHT0UzAmb+i9bOue6ZI4Bg=' 
  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"
    }
  }
}