SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a72e2c70fb872135cf27ab07124cd787d0b64793268da387f4488f39407e8ec3' 
  AND token = '8GrDZi1H/6vAjALPOluVU5oh+ww8XGFN3HUgYLhtppg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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