Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65a833e33ee8fea7c2b4424f050b4e58bab7721af3842ce6b3f16e74f8418dd0' 
  AND token = 'XsMMZiBziBKq3WRBbiM23C3kao6fa7ru3+iprQTc7Vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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