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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa2b722b37db73c223604a65cde7705b37ec8f147aaa6c89a5b33f3eafbe653e' 
  AND token = 'NYtpxQMQbmC/+gr1GXal92h834T/GFjiU7AXuX6Y/Es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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