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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce469a9b1743b8aabfa8c464fd17de86dff17604e119a5caa47bd98099585079' 
  AND token = '3qxVojx2ShU7uR0qmcvoe4T9tz/3ETfQw8ibZ2ybzvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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