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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58334743975c2dab34bf7ba560cf14cae6b08cca3affa8b338807d9e69b4b84b' 
  AND token = 'LT3HOjQHYgsKy5AZroxykR/QpTzUCTb9P35yjkBBWY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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