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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63d9014340b9ffe88e22c39308c958bfe73f69613f40d776303e6fc380d2ab94' 
  AND token = '18789GCpj9THp8SKb97X4NaldygzNm410dDaxeq7w+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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