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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '172aa837a62567c40c566742d1236fcbe14bafa630fe059363afab976f6c7d22' 
  AND token = 'YlUJYXbERvXL4Mym8Mi6x6xDBZfcWftI3nRU1qG3g9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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