SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bbebbe38ead937cbdd30c66a52f2bcf65cf938d48aa74e095723e662b6e0b2f' 
  AND token = 'J+J5i/3HK69B6oS+f93gYr4gZwzg7s6AQwMHXnq1UrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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