Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbc66f3ed2b4f0f68eb5fc379c4c679b32bd540a9ef815d6984cead371b624f3' 
  AND token = 'SIH9aviJfjur06xXXYem1KKnvZ1Smq5ha46DQ6FlX3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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