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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6538c9a43dc06c9cb8fdba23b21d32bf76215ace157a2656b4dda7045129529c' 
  AND token = 'EUdHTYS6qtGkyf8frucNi2Zd5w0Fs7wVFc1w7hEcS68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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