Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1de10500c542bb2308226d6afb0166464068db85a77478d623a65809489d0604' 
  AND token = 'SvuVVEFQJet6/VtP9jKB40Pf3OX2VUce5VfOoUC0++g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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