Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddb2170ec83f6555a1abf5266348199313d21fcea4bcfd723562faff0215c216' 
  AND token = 'X+Gq1gsKAvyOjKvwD0Kno3ych6llcslERtxKEf0yo/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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