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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04134ea82c429477590dee6e70d9667dd90e6b0f9f4c9ff4c1ebc7b6bf944104' 
  AND token = '3nxghaMrld0jI+thfE9PTqmgo0svTmn8aC7cx01fHsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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