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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed8c8107c5d795cef840bce9104e7d7bc2a41b5856bef9a2ae44b4f0ee1ba373' 
  AND token = '4K7hcHvwBiHM0KfAY0zQ9CO1NlDbl0f1sR40JZVhHnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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