Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a30c1f2f642433965ed3882b112e9fa2eb64b209fe8a27e68b4fb88524234b2' 
  AND token = 'urSLipqu7EHO6/2rKbMWEIv/yeF7eIApdL9mKVCw8YQ=' 
  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"
    }
  }
}