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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1aee47bdfcd59a5b44b9bcafe0cadb6cf155fe99271b1de6d894f3f910c1c5d6' 
  AND token = 'XGsszfpgL0tb2oem9MY0w4u8lzI9YMqo6HRg7Z2/gxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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