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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14a0aa0d019b604dcf15330df999bb307ebb1f5932a7d0c2ffdd161c3f96b6ab' 
  AND token = '5+6P22DrjUj8xsAUX5gHS9Gj0EdzPLAVnrBRlQSMwFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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