Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9edb0ac8032a768edc09eb6d0b11fba2f8791e768a9c1aee0970bc30a3312637' 
  AND token = 'v2GahnKybPZFIUNKtb4gb/GavEFw7GCu0QVEfXVGB28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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