SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c89e7122c7359237c9a69e1168f64d454221625cdab059192fa47b056081384a' 
  AND token = 'DSDVqVbJRhzuijcoz7LO0mdB3zmxvJT8zuk6LZgEK/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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