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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00423374b8ed65d5c28886ca9b34184b3a271333927cf4b8e7cb37379b6e003d' 
  AND token = 'qN51XCTdqNzxIeLxPuNltXxD7dphlxjMwE8N8vBOOx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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