Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de82bce7d45d09abdb245b15143f34bfe2bff5d8b89e3b713b0d4084f7f01a0b' 
  AND token = 'fS4Ho8rv91ulVd7+mZMKKikOiAl6ozS68wNF2jj3B68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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