Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75559b77590f1fbeb98809a6ffd9187e84dbc1d01295890404e82ca9819f715a' 
  AND token = 'oxcn11ooRJZPKSH7nGtaPDCeI+Gp7taubxhBnO5Y1OQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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