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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d1d03f3e3dc7b295ed23897312ac7701009f9b9146e57b8d34fdfcd5e383597' 
  AND token = 'tdn5w2n2qhXYK8FrziY3A4HVoEHI0If4e9DeUdAfQjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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