Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a88518b86c8d5b44513b30238cb5584c12f903f39cc4bb75ff2dad060b1ea77' 
  AND token = 'TlbMK4s6rXIOnqYpHAVFDzE5xNoMInNSgicvDAdQCBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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