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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12548b47c74bfc33fbc5e2c49c656002a5ad3042c76957caebb002463082814f' 
  AND token = '3yi72nptcN1oabl4+jXE6Znus1ahArRR1qiLGD388Mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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