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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dab4b5e21b72f29b7fe12c7bc762e0eb55bdebdddc1c315c46dcabbc3bca3ed' 
  AND token = 'Mzdi1ljMzolU+bN6ZJokzv/afuTbhvVl6IHmoOMmelQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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