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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'da9d10cf41d02edc80bba378bc33c4ac8584043d49bbd0edf4a969bfffa24243' 
  AND token = 'Ey2ncKcbP9turRSQERem4QxRNZbCyWykMCaLA7qQHow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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