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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08cbcec808b1d158c9383a34343f0a9bfb9d95f5277e914475d3c488ebe5c672' 
  AND token = 'AEhmkd+7y9/axin7uV2q7OlYSGLhcJBBUJXwUl34S0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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