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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '691de06029eda46c552c221bf20bbd3753cca74f09ea6a35dcf08479f69fe5fe' 
  AND token = 'FBT9peDtgbP5R+u0b9kU3xc67ZSpXznFrLW9Xlmn5vU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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