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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f66f690df2c88df1ac837d379e91655e0321a49e4d36f8330480c8e07fea2532' 
  AND token = 'q8f1Ce1JmLJMh7lV7UrJC41yJAwdFkzRkWYWHJ7zT8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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