Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c109c8046c59c6fb6b2ccd146971b8067334c3f1ba7bd415c5f99364ef0f6f8c' 
  AND token = 'qvsXMwCpSq5Tlp27jGs36/E2BO5/Yn6W2n0Z2Ajo5K8=' 
  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"
    }
  }
}