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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63a31dcf44c24d27f1a689f866794ebe0a107d35d5ab0095f9fa3692bd62bedc' 
  AND token = 'pli7T/9FT5YQF9Y0H6l/nndVc04nZbL8h1RNfyvd1Zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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