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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23b64bb26205cbe06a9bed304fb46105722bf0eac55fb5a1162ec7333118634f' 
  AND token = 'Wqhnw1q8XESR5ulj6TQNFrhLeWwtHsznXR228TtbmUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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