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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57a92012a9a5b17aec829a4ae28cf6c90595134f18e99212371e3705a1dd30eb' 
  AND token = 'QfFKgjU5Oi+0mVe8FIEse1cXyBduAhk/JwdOpwAp/Ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}