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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36815d3c20e760fabdd7c9b56a6b817f12d646d17ab0027764d10d8067cf78f8' 
  AND token = '1P1L5DavqBbooS9rP1uOo9nNXjVXtS1hUv7Pp7L0+hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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