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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee4d0a6e56b0426df1e05bce9c71b5d06ea9893584dbb4a3a5768c94111dd75' 
  AND token = '4HoVdnFS8hHXCiB8n13unZw0GFyuIULrO0gA1GBOmX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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