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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65bfb47f9fb515bcd008ac83addd2fd104e87a5181f5d5b41c91245b11405e2c' 
  AND token = 'W3/mo0UsfrU8krXNuISrEgMySNHj6PpdhJYhpIXOe1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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