Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dee60073bc596d20679b7d3d98ff23c1eadbfb14f291339b7b44757c61e2752b' 
  AND token = 'XlTr+XkmWOr1wgHjSirpDTGJg5uPXMvSiM33ObacUgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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