Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0065878756e801836922edf21da3d083b6f0df73c438fdc9872550f08295bce8' 
  AND token = 'wAMJEl01F1cDaow4UM/9f+qsfe6gU/MFeaSShHkQ09w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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