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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98a56b259ec87632ed1664bb99a8c3f9ad91e2d29d151684ee14bc0ad7a9736f' 
  AND token = 'sPgCWGSNxtbVROnGWU0+7ieuz4RVp6H72nWo7lWSKOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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