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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '994d7fcd3ae7f6cfd527a4fc7c2c572d7e2eafb92faf562a511758872dbc1d07' 
  AND token = 'ApCosty503o8hQWWBgttZjPODk7Ll9DiPexvnih2jrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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