Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd68c5b8c485453458a65032f691dc6804cdc2242cf42d7950b20c75334d4e192' 
  AND token = 'c9Uaanu4070BfLJ32tr6t4spIVxvIlbwNLjJYpBFc68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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